Shop All DNA Polymerases

Platinum™ II Taq Hot-Start DNA Polymerase Invitrogen™

Invitrogen Platinum II Taq Hot-Start DNA Polymerase is designed for universal primer annealing and fast, easy PCR with its unique combination of innovative buffer, high-performance engineered Taq DNA polymerase, and superior hot-start technology.

Features of Platinum II Taq Hot-Start DNA Polymerase include:
Innovative buffer—enables universal annealing temperature by isostabilizing primer-template duplex structures
Engineered Taq DNA polymerase—confers fast cycling and resistance to common inhibitors
Platinum hot-start technology—enables superior specificity, sensitivity, and yields; allows for room temperature reaction setup

Platinum II Taq Hot-Start DNA Polymerase is an engineered Taq DNA polymerase that shows increased resistance to reaction inhibitors originating from sample material or DNA purification steps. The polymerase has a higher DNA synthesis rate and delivers PCR results more than two times faster than other Taq DNA polymerases. Proprietary Platinum Taq antibodies block polymerase activity at ambient temperatures and dissociate after the initial denaturation step at 94°C. This automatic 'hot start' provides increased sensitivity, specificity, and yield, while allowing reaction assembly at room temperature.

Due to the unique composition of the Platinum II PCR buffer, the annealing temperature is 60°C for most primer pairs designed following the general design rules. Isostabilizing molecules in the buffer increase primer–template duplex stability during the annealing step and contribute to enhanced specificity without the need to optimize annealing temperature for each primer pair. With Platinum II Taq Hot-Start DNA Polymerase, different PCR assays can be cycled together using the same protocol with universal primer annealing temperature and the extension step selected for the longest fragment to be amplified.

Platinum II Taq Hot-Start DNA Polymerase is provided with the optional Platinum GC Enhancer for specific amplification and improved yields of GC-rich targets.

Use Platinum II Taq Hot-Start DNA Polymerase for the amplification of DNA from complex genomic, viral, and plasmid templates, as well as in RT-PCR, in applications like genotyping, high-throughput PCR, or with samples of suboptimal purity.

For increased convenience, we offer Platinum II Hot-Start PCR Master Mix (2X), where Platinum II Taq Hot-Start DNA Polymerase is provided in a ready-to-use mixture with Platinum II PCR buffer and dNTPs, thus reducing the number of pipetting steps during PCR reaction setup. Platinum II Hot-Start Green PCR Master Mix (2X) is also available, which additionally contains a density reagent and two tracking dyes for direct loading of PCR products on gels, further streamlining the PCR workflow from setup to final analysis of the result.

Find out more at www.thermofisher.com/platinumiitaq ›

Taq DNA Polymerase, recombinant (5 U/µL) Thermo Scientific™

Thermo Scientific Taq DNA Polymerase is a highly thermostable DNA polymerase from the thermophilic bacterium Thermus aquaticus. The enzyme catalyzes 5'→3' synthesis of DNA, has no detectable 3'→5' exonuclease (proofreading) activity and possesses low 5'→3' exonuclease activity. In addition, Taq DNA Polymerase exhibits deoxynucleotidyl transferase activity, which frequently results in the addition of extra adenines at the 3'-end of PCR products. Recombinant Taq DNA Polymerase is the ideal tool for standard PCR of templates 5 kb or shorter.

Highlights

Thermostable—half life is more than 40 min at 95°C
Generates PCR products with 3'-dA overhangs
Supplied with two buffers—10X Taq Buffer with KCl and 10X Taq Buffer with (NH4)2SO4. The latter allows for PCR at wide range of magnesium concentrations and decreases unspecific priming
Incorporates modified nucleotides (e.g., biotin-, digoxigenin-, fluorescently-labeled nucleotides)

Applications

• Routine PCR amplification of DNA fragments up to 5 kb
• High throughput PCR
• DNA labeling

Note

• The error rate of Taq DNA Polymerase in PCR is 2.2 x 10-5 errors per nt per cycle. Accordingly, the accuracy of PCR is 4.5 x 104. Accuracy is an inverse of the error rate and shows an average number of correct nucleotides incorporated before an error occurs.
• The 10X Taq Buffer without Detergent is recommended for microarray experiments.

DreamTaq™ Hot Start PCR Master Mix Thermo Scientific™

Thermo Scientific™ DreamTaq™ Hot Start PCR Master Mix is a ready-to-use 2X reaction mix that includes DreamTaq™ Hot Start DNA Polymerase, DreamTaq buffer, magnesium, and dNTPs. The master mix allows easy reaction setup with fewer pipetting steps, with only primers, template, and water needing to be added. A version of this master mix is also available with pre-added density reagent and electrophoresis tracking dyes.

DreamTaq Hot Start DNA Polymerase is an enhanced hot start Taq DNA polymerase that enables higher PCR specificity, sensitivity, and yields compared to conventional hot start Taq DNA polymerases. DreamTaq Hot Start DNA Polymerase employs antibody-based inhibition of DNA polymerase activity at ambient temperatures to prevent the amplification of non-specific products prior to the amplification step. With DreamTaq Hot Start DNA Polymerase, reactions can be set up at room temperature using the same protocol and cycling conditions as conventional Taq DNA polymerases.

DreamTaq Hot Start PCR Master Mix is formulated to enhance productivity:
• Better reaction outcomes
   --Higher yield of target amplicons from low template amounts
   --Increased reaction specificity due to reliable hot-start technology
   --Wider range of amplicon lengths - routine amplification of genomic DNA fragments up to 6kb
• Enhanced convenience
   --Room temperature reaction set-up
   --Minimized optimization of Mg2+ concentration and of primer annealing temperatures due to optimized reaction buffer
   --Simplified workflow and minimized pipetting steps with 2X master mix format

Applications:
• Routine PCR
• Colony PCR
• Genotyping
• RT-PCR
• Generation of PCR products for TA cloning

More DreamTaq Hot Start DNA Polymerase products >

DreamTaq™ Hot Start DNA Polymerase Thermo Scientific™

Thermo Scientific™ DreamTaq™ Hot Start DNA Polymerase is an enhanced hot start Taq DNA polymerase that enables higher PCR specificity, sensitivity, and yields compared to conventional hot start Taq DNA polymerases.

DreamTaq Hot Start DNA Polymerase employs antibody-based inhibition of DNA polymerase activity at ambient temperatures to prevent the amplification of non-specific products prior to the amplification step. With DreamTaq Hot Start DNA Polymerase, reactions can be set up at room temperature using the same protocol and cycling conditions as conventional Taq DNA polymerases. The enzyme is supplied with an optimized 10X DreamTaq buffer containing magnesium chloride, which eliminates the need for extensive optimization of reaction conditions. DreamTaq Hot Start DNA Polymerase is also available with pre-added density reagent and electrophoresis tracking dyes, as well as in master mix format.

DreamTaq Hot Start DNA Polymerase is formulated to enhance productivity through:
• Better reaction outcomes
   --Higher yield of target amplicons from low template amounts
   --Increased reaction specificity due to reliable hot-start technology
   --Wider range of amplicon lengths—routine amplification of genomic DNA fragments up to 6 kb
• Enhanced convenience
   --Room temperature reaction set-up
   --Minimized optimization of Mg2+ concentration and of primer annealing temperatures due to optimized reaction buffer

Applications:
• Routine PCR
• Colony PCR
• Genotyping
• RT-PCR
• Generation of PCR products for TA cloning

More DreamTaq Hot Start DNA Polymerase products >

DreamTaq Green DNA Polymerase (5 U/µL) Thermo Scientific™

Thermo Scientific DreamTaq Green DNA Polymerase is a combination of DreamTaq DNA Polymerase and 10X DreamTaq Green Buffer. DreamTaq DNA Polymerase is an enhanced Taq polymerase optimized for high throughput PCR applications. It ensures higher sensitivity, longer PCR products and higher yields compared to conventional Taq DNA polymerase. Extensive optimization of reaction conditions is not required.

The 10X DreamTaq Green Buffer includes a density reagent and two tracking dyes for direct loading of PCR products on a gel. The colored buffer does not interfere with PCR performance and is compatible with downstream applications such as DNA sequencing, ligation and restriction digestion. For applications requiring PCR product analysis by absorbance or fluorescence excitation, we recommend using the colorless 10X DreamTaq Buffer (#B65) or purifying the PCR product before analysis. The 10X DreamTaq Green Buffer is optimized for robust performance in PCR and includes MgCl2 at a concentration of 20 mM.

Highlights

• Direct loading of PCR product on gel
• High yields and high sensitivity of PCR
• Amplification of long targets up to 6 kb from genomic DNA and up to 20 kb from viral DNA
• Robust amplification with minimal optimization
• Incorporates modified nucleotides, but does not incorporate dUTP

Applications

• Routine PCR amplification of DNA fragments up to 6 kb
• Genotyping
• High throughput PCR

Taq DNA Polymerase, recombinant (1 U/µL) Thermo Scientific™

Thermo Scientific Taq DNA Polymerase is a highly thermostable DNA polymerase from the thermophilic bacterium Thermus aquaticus. The enzyme catalyzes 5'→3' synthesis of DNA, has no detectable 3'→5' exonuclease (proofreading) activity and possesses low 5'→3' exonuclease activity. In addition, Taq DNA Polymerase exhibits deoxynucleotidyl transferase activity, which frequently results in the addition of extra adenines at the 3'-end of PCR products. Recombinant Taq DNA Polymerase is the ideal tool for standard PCR of templates 5 kb or shorter.

Highlights

Thermostable—half life is more than 40 min at 95°C
Generates PCR products with 3'-dA overhangs
Supplied with two buffers—10X Taq Buffer with KCl and 10X Taq Buffer with (NH4)2SO4. The latter allows for PCR at wide range of magnesium concentrations and decreases unspecific priming
Incorporates modified nucleotides (e.g., biotin-, digoxigenin-, fluorescently-labeled nucleotides)

Applications

• Routine PCR amplification of DNA fragments up to 5 kb
• High throughput PCR
• DNA labeling

Note

• The error rate of Taq DNA Polymerase in PCR is 2.2 x 10-5 errors per nt per cycle. Accordingly, the accuracy of PCR is 4.5 x 104. Accuracy is an inverse of the error rate and shows an average number of correct nucleotides incorporated before an error occurs.
• The 10X Taq Buffer without Detergent is recommended for microarray experiments.

DreamTaq™ Hot Start Green DNA Polymerase Thermo Scientific™

Thermo Scientific™ DreamTaq™ Hot Start Green DNA Polymerase is an enhanced hot start Taq DNA polymerase that enables higher PCR specificity, sensitivity, and yields compared to conventional hot start Taq DNA polymerases. The enzyme is supplied with an optimized 10X DreamTaq Green buffer that includes density reagent and two tracking dyes for convenient direct loading of PCR products on a gel. The buffer contains magnesium chloride, which eliminates the need for extensive optimization of reaction conditions. DreamTaq Hot Start DNA Polymerase is also available without pre-added density reagent and electrophoresis tracking dyes, as well as in master mix format.

DreamTaq Hot Start DNA Polymerase employs antibody-based inhibition of DNA polymerase activity at ambient temperatures to prevent the amplification of non-specific products prior to the amplification step. With DreamTaq Hot Start DNA Polymerase, reactions can be set up at room temperature using the same protocol and cycling conditions as conventional Taq DNA polymerases.

DreamTaq Hot Start Green DNA Polymerase is formulated to enhance productivity through:
• Better reaction outcomes
   --Higher yield of target amplicons from low template amounts
   --Increased reaction specificity due to reliable hot-start technology
   --Wider range of amplicon lengths—routine amplification of genomic DNA fragments up to 6 kb
• Enhanced convenience
   --Room temperature reaction set-up
   --Minimized optimization of Mg2+ concentration and of primer annealing temperatures due to optimized reaction buffer
   --Direct loading of PCR products on a gel with DreamTaq Green buffer

Applications:
• Routine PCR
• Colony PCR
• Genotyping
• RT-PCR
• Generation of PCR products for TA cloning

More DreamTaq Hot Start DNA Polymerase products >

Maxima Reverse Transcriptase (200 U/µL) Thermo Scientific™

Thermo Scientific Maxima Reverse Transcriptase (RT) was developed through in vitro evolution of M-MuLV RT. The enzyme possesses an RNA-dependent and DNA-dependent polymerase activity as well as RNase H activity. The engineered enzyme features dramatically improved thermostability and robustness, and increased synthesis rates compared to wild type M-MuLV RT.

Maxima Reverse Transcriptase is capable of reproducible cDNA synthesis from a wide range of input total RNA amounts (from 1 pg to 5 µg) at elevated temperatures (50 to 65°C), which makes this enzyme an ideal tool for two step RT-qPCR (see supporting data).

Due to its high thermostability, Maxima enzyme maintains full activity during the entire reverse transcription reaction, generates the highest yields of cDNA, and is able to synthesize even very long RNA transcripts up to 20 kb. The reaction temperature can be increased up to 65°C for efficient transcription of RNA regions with a high secondary structure or to improve specificity using gene specific primers. Due to its increased synthesis rate, the reverse transcriptase reaction can be completed in 15 to 30 min.

Highlights

• High yields of full-length cDNA up to 20 kb
• Active up to 65°C
• Thermostable—90% active after incubation at 50°C for 60 minutes
• High sensitivity—reproducible cDNA synthesis from a wide range of total RNA quantities (1 pg to 5 µg)
• Efficient—complete cDNA synthesis in 15 to 30 minutes
• Incorporates modified nucleotides

Applications

• Two step RT-PCR
• Two step RT-qPCR
• First strand cDNA synthesis
• Construction of full length cDNA libraries
• DNA labeling
• Primer extension

Also available: Maxima First Strand cDNA Synthesis Kit for RT-qPCR

DreamTaq™ Hot Start Green PCR Master Mix Thermo Scientific™

Thermo Scientific™ DreamTaq™ Hot Start Green PCR Master Mix is a ready-to-use 2X reaction mix that includes DreamTaq™ Hot Start DNA Polymerase, DreamTaq Green buffer, magnesium, and dNTPs. The master mix allows easy reaction setup with fewer pipetting steps, with only primers, template, and water needing to be added. The green master mix includes density reagent and two tracking dyes for convenient direct loading of PCR products on a gel.

DreamTaq Hot Start DNA Polymerase is an enhanced hot start Taq DNA polymerase that enables higher PCR specificity, sensitivity, and yields compared to conventional hot start Taq DNA polymerases.

DreamTaq Hot Start DNA Polymerase employs antibody-based inhibition of DNA polymerase activity at ambient temperatures to prevent the amplification of non-specific products prior to the amplification step. With DreamTaq Hot Start DNA Polymerase, reactions can be set up at room temperature using the same protocol and cycling conditions as conventional Taq DNA polymerases.

DreamTaq Hot Start Green PCR Master Mix is formulated to enhance productivity through:
• Better reaction outcomes
   --Higher yield of target amplicons from low template amounts
   --Increased reaction specificity due to reliable hot-start technology
   --Wider range of amplicon lengths—routine amplification of genomic DNA fragments up to 6 kb
• Enhanced convenience
   --Room temperature reaction set-up
   --Minimized optimization of Mg2+ concentration and of primer annealing temperatures due to optimized reaction buffer
   --Simplified workflow and minimized pipetting steps with 2X master mix format
   --Direct loading of PCR products on a gel

Applications:
• Routine PCR
• Colony PCR
• Genotyping
• RT-PCR
• Generation of PCR products for TA cloning

More DreamTaq Hot Start DNA Polymerase products >

SuperFi™ Buffer Invitrogen™

Invitrogen™ SuperFi™ Buffer is a 5X buffer solution optimized for use with Invitrogen™ Platinum™ SuperFi DNA Polymerase. The buffer contains 7.5 mM MgCl2 which provides 1.5 mM MgCl2 in the final reaction.

For direct loading of PCR products on gels, use SuperFi™ Green Buffer which includes a density reagent and two electrophoresis tracking dyes. The colored buffer does not interfere with the enzyme performance and is compatible with downstream applications such as DNA sequencing, ligation, and restriction digestion.

More Platinum SuperFi DNA Polymerase products ›

Platinum™ SuperFi II DNA Polymerase Invitrogen™

Invitrogen Platinum SuperFi II DNA Polymerase is a proofreading DNA polymerase that combines superior fidelity with an innovative buffer, enabling universal primer annealing for the highest success in PCR. It is ideally suited for cloning, mutagenesis, and other applications benefiting from supreme sequence accuracy.

Features of Platinum SuperFi II DNA Polymerase include:
• Exceptional >300X Taq fidelity
• Universal primer annealing at 60°C
• Superior specificity, sensitivity, and yields
• Robust amplification of difficult-to-amplify targets (e.g., those with suboptimal purity, ˃65% GC content, long PCR requirement)

Platinum SuperFi II DNA Polymerase is an engineered enzyme high processivity and increased resistance to PCR inhibitors. It also enables fast-cycling protocols and amplification of long targets (up to 20 kb). Platinum hot-start technology is based on proprietary antibodies that inhibit enzyme activity until the initial PCR denaturation step, preventing non-specific amplification and primer degradation. This technology also enables reaction setup at room temperature and provides increased sensitivity and yield.

Due to the unique composition of the SuperFi II PCR buffer, the annealing temperature is 60°C for most primer pairs designed following the general design rules. Isostabilizing molecules in the buffer increase primer-template duplex stability during the annealing step and contribute to enhanced specificity without the need to optimize the annealing temperature for each primer pair. With Platinum SuperFi II DNA Polymerase, different PCR assays can be cycled together using the same protocol with a universal primer annealing temperature and an extension step selected for the longest fragment to be amplified.

Applications of Platinum SuperFi II DNA Polymerase:
• High-fidelity PCR
• Cloning and sub-cloning
• Site-directed mutagenesis
• Amplification of GC-rich templates
• Template generation for sequencing
• High-throughput PCR
• Amplification of samples with suboptimal purity
• Long PCR
• Fast PCR

For increased convenience, we offer Platinum SuperFi II Master Mix with Platinum SuperFi II DNA Polymerase provided in a ready-to-use mixture along with SuperFi II PCR buffer and dNTPs, thus reducing the number of pipetting steps during PCR reaction setup. Platinum SuperFi II Green PCR Master Mix is also available, which additionally contains a density reagent and two tracking dyes for direct loading of PCR products on gels, further streamlining the PCR workflow from setup to final analysis.

View more information about Platinum SuperFi II DNA Polymerase products ›

Maxima H Minus Reverse Transcriptase (200 U/µL) Thermo Scientific™

Thermo Scientific Maxima H Minus Reverse Transcriptase (RT) was developed through in vitro evolution of M-MuLV RT. The enzyme possesses an RNA-dependent and DNA-dependent polymerase activity but lacks RNase H activity due to mutation in RNase H domain of M-MuLV RT. The engineered enzyme features dramatically improved thermostability, 50X higher processivity, robustness and increased synthesis rate compared to wild type M-MuLV RT.

The eliminated RNase H activity enables the enzyme to produce very long RNA transcripts up to 20 kb. Due to its high thermostability, the enzyme maintains full activity during the entire reverse transcription reaction and generates high yields of cDNA. The reaction temperature can be increased up to 65°C for efficient transcription of RNA regions with a high secondary structure or to improve specificity using gene specific primers. The extremely high processivity of Maxima H Minus enzyme results in increased resistance to common reaction inhibitors, such as guanidine, formamide and ethanol.

Highlights

• Thermostable—90% active after incubation at 50°C for 60 minutes in a reaction mixture.
• Active up to 65°C
• High yields of full-length cDNA up to 20 kb
• High sensitivity—reproducible cDNA synthesis from a wide range of starting total RNA amounts (1 pg to 5 µg)
• Efficient—complete cDNA synthesis in 15 to 30 minutes
• Increased resistance to common reaction inhibitors
• Incorporates modified nucleotides

Applications

• First strand cDNA synthesis for RT-PCR and real-time RT-PCR.
• Reverse transcription at elevated temperatures to reduce effects of secondary structure.
• Synthesis of cDNA for cloning and expression.
• Generation of labeled cDNA probes for microarrays.
• Analysis of RNA by primer extension.

Note
• Also available: : Maxima H Minus First Strand cDNA Synthesis Kit.

dsDNase Thermo Scientific™

Thermo Scientific dsDNase is an engineered shrimp DNase designed for rapid and safe removal of contaminating genomic DNA from RNA samples. It is an endonuclease that cleaves phosphodiester bonds in DNA to yield oligonucleotides with 5'-phosphate and 3'-hydroxyl termini. Highly specific activity towards double-stranded DNA ensures that RNA and single-stranded DNA such as cDNA and primers are not cleaved. dsDNase is easily inactivated by modetate heat treatment (55°C). These features make dsDNase an excellent choice for gDNA elimation prior reverse transcription. It allows for dramatically simplified workflow which combines genomic DNA elimination and cDNA synthesis into one-tube procedure.

Highlights

• Highly specific degradation of double-stranded DNA
• Fast 2 min protocol for gDNA removal prior reverse transcription
• Heat-labile—irreversibly inactivated by moderate heat treatment (55°C)

Applications

• Genomic DNA removal from RNA samples prior first strand cDNA synthesis, RT-PCR and RT-qPCR

Specificities of dsDNase—dsDNase activity towards double- and single-stranded DNA and RNA oligonucleotides was measured. Relative activity values indicate that dsDNase is highly specific to double-stranded DNA.

• dsDNA - 100% relative activity
• ssDNA - <0.03% relative activity
• dsRNA - <0.01% relative activity
• ssRNA - <0.01% relative activity

RevertAid Reverse Transcriptase (200 U/µL) Thermo Scientific™

Thermo Scientific RevertAid Reverse Transcriptase (RT) is a recombinant M-MuLV RT. It differs from the M-MuLV RT by its structure and catalytic properties. The enzyme possesses an RNA-dependent and DNA-dependent polymerase activity and a RNase H activity specific to RNA in RNA-DNA hybrids which is significantly lower than that of Avian Myeloblastosis Virus (AMV) reverse transcriptase.

Highlights

• Efficient synthesis of full-length first strand cDNA up to 13 kb
• Optimum activity at 42°C
• Active up to 50°C
• Incorporates modified nucleotides (e.g., Cy3-, Cy5-, rhodamine-, aminoallyl-, fluorescein-labeled nucleotides)

Applications

• First strand cDNA synthesis for RT-PCR and real-time RT-PCR
• Synthesis of cDNA for cloning and expression
• Generation of labeled cDNA probes for microarrays
• DNA labeling
• Analysis of RNA by primer extension

Platinum™ SuperFi™ PCR Master Mix Invitrogen™

Invitrogen™ Platinum™ SuperFi™ PCR Master Mix is a ready-to-use mixture of DNA polymerase, salts, magnesium, and dNTPs for efficient PCR amplification. Only template, primers, and water need to be added, thus reducing the number of pipetting steps during PCR reaction setup.

Benefits of Platinum SuperFi PCR Master Mix include:
• Exceptional >300X Taq fidelity
• High specificity and increased yields with Platinum hot-start technology
• Robust amplification of difficult-to-amplify targets including those of sub-optimal purity or with ˃65% GC content
• Convenient workflow with room temperature reaction setup and 24 h bench top stability of pre-assembled reactions

Platinum SuperFi PCR Master Mix retains all the features of Platinum™ SuperFi™ DNA Polymerase, which is a proofreading DNA polymerase that combines superior fidelity with trusted Platinum™ hot-start technology for the highest success in PCR. Featuring >300X Taq fidelity, Platinum SuperFi DNA Polymerase is ideally suited for cloning, mutagenesis, and other applications benefiting from supreme sequence accuracy.

Platinum SuperFi DNA Polymerase is engineered with a DNA-binding domain resulting in high processivity and increased resistance to PCR inhibitors. This feature also enables fast-cycling protocols and amplification of long targets. The Platinum hot-start technology is based on proprietary antibodies that inhibit enzyme activity until the initial PCR denaturation step, preventing non-specific amplification and primer degradation.

Applications of Platinum SuperFi DNA Polymerase

• High-fidelity PCR
• Cloning and sub-cloning
• Site-directed mutagenesis
• Amplification of GC-rich templates
• Template generation for sequencing
• High-throughput PCR
• Amplification of samples with suboptimal purity
• Long PCR
• Fast PCR

Using Platinum SuperFi PCR Master Mix
Annealing rules for Platinum SuperFi DNA Polymerase are different from many common DNA polymerases (such as Taq DNA polymerases). For optimal results, use the Tm calculator on our website: www.thermofisher.com/tmcalculator.

Platinum SuperFi PCR Master Mix is supplied with a separate vial of SuperFi™ GC Enhancer designed for difficult and GC-rich templates (˃65% GC).

Platinum hot-start technology efficiently inhibits DNA polymerase activity at ambient temperatures, allowing convenient reaction setup at room temperature. In addition, pre-assembled PCR reactions may be stored at room temperature for up to 24h prior to the PCR.

More Platinum SuperFi DNA Polymerase products ›

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